+# Setting up Nominatim for Development
+
+This chapter gives an overview how to set up Nominatim for developement
+and how to run tests.
+
+!!!Important
+This guide assumes that you develop under the latest version of Ubuntu. You
+can of course also use your favourite distribution. You just might have to
+adapt the commands below slightly, in particular the commands for installing
+additional software.
+
+## Installing Nominatim
+
+The first step is to install Nominatim itself. Please follow the installation
+instructions in the [Admin section](../admin/Installation.md). You don't need
+to set up a webserver for development, the webserver that is included with PHP
+is sufficient.
+
+If you want to run Nominatim in a VM via Vagrant, use the default `ubuntu` setup.
+Vagrant's libvirt provider runs out-of-the-box under Ubuntu. You also need to
+install an NFS daemon to enable directory sharing between host and guest. The
+following packages should get you started:
+
+ sudo apt install vagrant vagrant-libvirt libvirt-daemon nfs-kernel-server
+
+## Prerequisites for testing and documentation
+
+The Nominatim tests suite consists of behavioural tests (using behave) and
+unit tests (using PHPUnit). It has the following additional requirements:
+
+* [behave test framework](https://github.com/behave/behave) >= 1.2.5
+* [nose](https://nose.readthedocs.org)
+* [pytidylib](http://countergram.com/open-source/pytidylib)
+* [phpunit](https://phpunit.de) >= 7.3
+* [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer)
+
+The documentation is built with mkdocs:
+
+* [mkdocs](https://www.mkdocs.org/) >= 1.1.2
+
+### Installing prerequisites on Ubuntu/Debian
+
+Some of the Python packages require the newest version which is not yet
+available with the current distributions. Therefore it is recommended to
+install pip to get the newest versions.
+
+To install all necessary packages run:
+
+```sh
+sudo apt install php-cgi phpunit php-codesniffer \
+ python3-pip python3-setuptools python3-dev
+
+pip3 install --user behave nose mkdocs
+```
+
+The `mkdocs` executable will be located in `.local/bin`. You may have to add
+this directory to your path, for example by running:
+
+```
+echo 'export PATH=~/.local/bin:$PATH' > ~/.profile
+```
+
+If your distribution does not have PHPUnit 7.3+, you can install it (as well
+as CodeSniffer) via composer:
+
+```
+sudo apt-get install composer
+composer global require "squizlabs/php_codesniffer=*"
+composer global require "phpunit/phpunit=8.*"
+```
+
+The binaries are found in `.config/composer/vendor/bin`. You need to add this
+to your PATH as well:
+
+```
+echo 'export PATH=~/.config/composer/vendor/bin:$PATH' > ~/.profile
+```
+
+
+## Executing Tests
+
+All tests are located in the `\test` directory.
+
+### Preparing the test database
+
+Some of the behavioural test expect a test database to be present. You need at
+least 2GB RAM and 10GB disk space to create the database.
+
+First create a separate directory for the test DB and Fetch the test planet
+data and the Tiger data for South Dakota:
+
+```
+mkdir testdb
+cd testdb
+wget https://www.nominatim.org/data/test/nominatim-api-testdata.pbf
+wget -O - https://nominatim.org/data/tiger2018-nominatim-preprocessed.tar.gz | tar xz --wildcards --no-anchored '46*'
+```
+
+Configure and build Nominatim in the usual way:
+
+```
+cmake $USERNAME/Nominatim
+make
+```
+
+Copy the test settings:
+
+```
+cp $USERNAME/Nominatim/test/testdb/local.php settings/
+```
+
+Inspect the file to check that all settings are correct for your local setup.
+
+Now you can import the test database:
+
+```
+dropdb --if-exists test_api_nominatim
+./utils/setup.php --all --osm-file nominatim-api-testdb.pbf 2>&1 | tee import.log
+./utils/specialphrases.php --wiki-import | psql -d test_api_nominatim 2>&1 | tee -a import.log
+./utils/setup.php --import-tiger-data 2>&1 | tee -a import.log
+```
+
+### Running the tests
+
+To run all tests just go to the test directory and run make:
+
+```sh
+cd test
+make
+```
+
+To skip tests that require the test database, run `make no-test-db` instead.
+
+For more information about the structure of the tests and how to change and
+extend the test suite, see the [Testing chapter](Testing.md).
+
+## Documentation Pages
+
+The [Nominatim documentation](https://nominatim.org/release-docs/develop/) is
+built using the [MkDocs](https://www.mkdocs.org/) static site generation
+framework. The master branch is automatically deployed every night on
+[https://nominatim.org/release-docs/develop/](https://nominatim.org/release-docs/develop/)
+
+To build the documentation, go to the build directory and run
+
+```
+make doc
+INFO - Cleaning site directory
+INFO - Building documentation to directory: /home/vagrant/build/site-html
+```
+
+This runs `mkdocs build` plus extra transformation of some files and adds
+symlinks (see `CMakeLists.txt` for the exact steps).
+
+Now you can start webserver for local testing
+
+```
+build> mkdocs serve
+[server:296] Serving on http://127.0.0.1:8000
+[handlers:62] Start watching changes
+```
+
+If you develop inside a Vagrant virtual machine, use a port that is forwarded
+to your host:
+
+```
+build> mkdocs serve --dev-addr 0.0.0.0:8088
+[server:296] Serving on http://0.0.0.0:8088
+[handlers:62] Start watching changes
+```
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